Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5516277 | Process of fuel combustion | Hiromichi Yanagihara | 1996-05-14 |
| 4441971 | Process and apparatus for reducing soot | Yoshimi Kizaki | 1984-04-10 |
| 4267483 | Insulator on spark plug electrode coated with zirconium and vanadium oxides | Koichi Nakajima, Tokuhiko Okamoto, Minoru Konaka, Minoru Nagai, Kanji Higuchi +1 more | 1981-05-12 |
| 4250426 | Spark plug having vanadium oxide islands on central insulator | Koichi Nakajima, Tokuhiko Okamoto, Minoru Konaka, Minoru Nagai, Kanji Higuchi +1 more | 1981-02-10 |